| 李坤炬,林巨,王欢,吴晓洁.基于FEM-PE混合模型的气泡幕降噪效果研究[J].,2023,42(2):226-236 |
| 基于FEM-PE混合模型的气泡幕降噪效果研究 |
| Study on noise reduction effect of air bubble curtain based on FEM-PE mixed model |
| 投稿时间：2021-12-14 修订日期：2023-03-06 |
| 中文摘要: |
| 针对以往气泡幕降噪效果研究中气泡幕模型设置过于理想，无法真实反映气泡幕降噪效果空间不均匀性的问题，本文采用有限元-抛物方程(FEM-PE)混合模型对包含气泡幕的水下打桩噪声场进行了仿真模拟，分析了应用气泡幕时打桩噪声的传播特性，并重点研究了气泡幕的厚度、占空比以及布放位置等不同参数下气泡幕的降噪效果。结果表明，增加气泡幕的厚度可有限提高气泡幕的降噪量，气泡幕的占空比应保持在0.5%~1%，气泡半径较大的气泡幕在较低频率有更好的降噪效果，此外应合理调整气泡幕的布放位置以应对打桩噪声的多途传播特性，对打桩施工时气泡幕的参数设置具有参考意义。 |
| 英文摘要: |
| In order to solve the problem that the air bubble curtain model is too ideal to reflect the spatial heterogeneity of the noise reduction effect of the air bubble curtain in the previous research on the noise reduction effect of the air bubble curtain, the finite element-parabolic equation method (FEM-PE) mixed model is used to simulate the noise field of underwater piling with air bubble curtain. The propagation characteristics of piling noise when applying air bubble curtain were analyzed, and the noise reduction effect of air bubble curtain under different parameters such as thickness, air-volume fraction and placement position of air bubble curtain was studied. The results show that increasing the thickness of the air bubble curtain can improve the noise reduction of the air bubble curtain to a limited extent, the air-volume fraction of the air bubble curtain should be maintained at 0.5%~1%, and the air bubble curtain with larger bubble radius has better noise reduction effect at lower frequencies, and the placement position of the air bubble curtain should be reasonably adjusted to cope with the multi-path propagation characteristics of the piling noise, which have reference value for the parameter setting of the air bubble curtain during piling construction. |
| DOI：10.11684/j.issn.1000-310X.2023.02.004 |
| 中文关键词: 气泡幕 打桩 水下噪声 抛物方程 有限元分析 |
| 英文关键词: air bubble curtain piling underwater noise parabolic equation finite element analysis |
| 基金项目: |
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